Radar detection-detection-dry integrated method

Abstract

The invention belongs to the technical field of airborne radar and electronic warfare module cooperative detection and tracking, and particularly relates to a radar detection and interference integrated method, detection, detection and interference are simultaneously realized in a frame in a radar and do not influence each other, the electronic warfare module can perform radiation identification on a radiation source during detection and reception of echoes, and the detection, detection and interference are not influenced by each other. Interference parameters are provided, useless transition period time is detected by the radar on the premise that existing detection of the radar is not changed, the part of time is used for interference, and the energy use efficiency of the radar is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of cooperative detection and tracking of airborne radar and electronic warfare modules, and specifically relates to a radar detection and tracking integration method. Background Art

[0002] Modern aircraft platforms are equipped with radars, electronic warfare systems and other equipment, which all use a large number of independent radio frequency sensors scattered throughout the avionics system structure to perform their respective functions. The research on radar electronic warfare integration technology is not comprehensive enough, resulting in a large weight and volume of the aircraft platform.

[0003] A simple radar has the advantages of high detection accuracy and comprehensive information, but when facing stealth targets, its detection power is weak and it is susceptible to electronic warfare interference. The radar is integrated with an electronic warfare module, which can make full use of the high power, high gain and physical space advantages of the radar aperture to improve the detection sensitivity, electronic warfare interference power, and electronic warfare cover power within the radar frequency band, so that the radar has the integrated detection, reconnaissance and interference functions, making up for its shortcomings of weak detection power for stealth targets and susceptibility to electronic warfare interference.

[0004] Existing research and exploration mainly focus on the simultaneous compatibility between radar and electronic warfare systems, ensuring that radar and electronic warfare systems can work simultaneously without affecting each other. Liu Feng analyzed the influence of electronic warfare system radiation on radar reception. In order to reduce the influence of electronic warfare system on radar, the radar antenna installation position is reasonably selected to make the spatial coupling between the electronic warfare system antenna and the radar receiving antenna as small as possible; the radar suppresses the spatial back lobe power as much as possible to reduce the influence of electronic warfare system radiation on radar reception; frequency management technology is used, radar and electronic warfare system exchange information, and radar selects frequency points in the predicted working frequency band; the main noise ratio of the electronic warfare system spectrum is improved to reduce the influence of stray on radar; the electronic warfare system link works in the linear region to reduce intermodulation signals; spectrum notching is performed to reduce the radiation power of the electronic warfare system near the radar working frequency point (see "Research on Simultaneous Compatibility of Airborne Electronic Warfare Radiation and Radar Reception", written by Liu Feng). This technical solution has the following defects:

[0005] 1) The installation locations of radar and electronic warfare systems are arranged according to the airborne systems. The spatial coupling between them cannot be calculated, and there will be large differences at different frequencies.

[0006] 2) The radar selects the frequency within the predicted frequency band, which reduces the flexibility of frequency selection.

[0007] This application is proposed in view of the above-mentioned technical defects. Summary of the invention

[0008] The purpose of the present application is to provide a radar detection and interference integration method to overcome or alleviate at least one of the known technical deficiencies.

[0009] The technical solution of this application is:

[0010] A radar detection and detection integrated method, comprising:

[0011] Step 1: In the radar air-to-air mode, determine that the resource scheduling type is tracking mode;

[0012] Step 2: Detect and obtain the target distance R and speed V;

[0013] Step 3: Determine the waveform pulse repetition period PRI and pulse width Pw used in the current frame according to the target distance R, speed V and carrier ground speed Vp;

[0014] Step 4: Force the radar to use manual automatic gain control mode;

[0015] Step 5: Determine the transition period N1 and the number of accumulated points N2 of the current frame according to the current frame period, for a total of N1+N2 pulses;

[0016] Step 6: Set the radar antenna to broadband transmission mode and broadband reception mode;

[0017] Step 7: Within N2 pulses before the current frame, only the radar detection excitation signal is transmitted;

[0018] Step 8: within N1 pulses after the current frame, transmit an interference excitation signal;

[0019] Step 9: In the current frame pulse string, during the reception period, the radar samples the detection signal normally, and the electronic warfare module detects the radiation source signal in real time;

[0020] Step 10: Calculate the first echo data N3 of the radar receiving signal for initial processing according to the target distance R;

[0021] Step 11: The radar performs signal and data processing on the received signals N3 to N3+N1-1 pulses to obtain target parameters.

[0022] According to at least one embodiment of the present application, in the above-mentioned radar detection and interference integration method, in step 4, when the radar is forced to use the manual automatic gain control mode, the manual automatic gain control value adopts the automatic gain control value used for tracking the target in the previous frame.

[0023] According to at least one embodiment of the present application, in the above-mentioned radar detection and interference integration method, in step eight, within N1 pulses after the current frame, when the interference excitation signal is emitted, the electronic warfare module is used to perform smart noise interference or false target interference on the radiation source according to the received radiation source signal.

[0024] According to at least one embodiment of the present application, in the above-mentioned radar detection and interference integration method, in step ten, the first echo data N3 for starting processing of the radar receiving signal is calculated based on the target distance R, which is specifically obtained by rounding up 2*R / C / PRI, where C is the speed of light.

[0025] According to at least one embodiment of the present application, in the above-mentioned radar detection and interception integration method, in step eleven, the radar performs signal and data processing on the received signals N3 to N3+N1-1 pulses to obtain target parameters, including distance, speed, azimuth, and pitch angle.

[0026] This application has at least the following beneficial technical effects:

[0027] The invention provides a radar detection and interference integration method, which realizes detection, reception and interference simultaneously within one frame inside the radar without affecting each other. During the detection and reception of echoes, the electronic warfare module can identify the radiation source and provide interference parameters. Moreover, under the premise of not changing the existing detection of the radar, the useless transition cycle time of radar detection is used to interfere, thereby improving the energy utilization efficiency of the radar. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the waveform design of the radar detection and detection integration method provided in this application;

[0029] Figure 2 A schematic diagram of the flow chart of the radar detection and stem integration method provided in this application.

[0030] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be construed as limitations on the present application. DETAILED DESCRIPTION

[0031] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be described in further detail in detail and in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design.

[0032] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application indicates that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0033] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0034] The present application provides a radar detection and tracking integration method, which adds an electronic warfare module to the radar, and breaks the current situation where the existing airborne radar and the electronic warfare module work simultaneously and affect each other by designing the detection and tracking integrated waveform. In the same frame, the radar can meet the normal target detection and tracking functions, and at the same time, the electronic warfare module can detect and locate the external radiation source signal within the receiving time period, determine the frequency, period, pulse width and other information of the radiation source, and then interfere with the specific radiation source signal, so as to quickly realize the detection and tracking integrated waveform usage strategy within one frame, such as Figure 1 shown.

[0035] Step 1: In the radar air-to-air mode, determine that the resource scheduling type is tracking mode.

[0036] Step 2: Detect and obtain the target distance R and speed V.

[0037] Step 3: Determine the waveform pulse repetition period PRI and pulse width Pw used in the current frame according to the target distance R, speed V and carrier ground speed Vp.

[0038] Step 4: Force the radar to use manual automatic gain control mode. The manual automatic gain control value is the automatic gain control value used in the previous frame of target tracking.

[0039] Step 5: Determine the transition period N1 and the number of accumulated points N2 of the current frame according to the current frame period, for a total of N1+N2 pulses, such as Figure 2 shown.

[0040] Step 6: Set the radar antenna to broadband transmission mode and broadband reception mode.

[0041] Step 7: Within N2 pulses before the current frame, only the radar detection excitation signal is emitted, which does not affect the detection power, such as Figure 2 shown.

[0042] Step 8: Within N1 pulses after the current frame, transmit an interference excitation signal, and use the electronic warfare module to perform smart noise interference or false target interference on the radiation source according to the received radiation source signal.

[0043] Step 9: In the current frame pulse string, during the reception period, the radar samples the detection signal normally, and the electronic warfare module detects the radiation source signal in real time.

[0044] Step 10: According to the target distance R, the first echo data N3 of the radar receiving signal for initial processing is calculated, such as Figure 2 shown.

[0045] The first echo data N3 of the radar receiving signal starting processing is obtained by rounding up 2*R / C / PRI, where C is the speed of light.

[0046] Step 11: The radar processes the received signals N3 to N3+N1-1 pulses and obtains target parameters, including distance, speed, azimuth, pitch angle, etc., thereby completing the detection, reception, interference and other functions in the current frame, so that the radar has a complete integrated detection, reconnaissance and interference strategy.

[0047] The radar detection and detection integrated method disclosed in the above embodiment is implemented as follows in a specific embodiment:

[0048] Step 1: In the radar air-to-air mode, determine that the resource scheduling type is tracking mode.

[0049] Step 2: Detect and obtain the target distance R = 125km, speed V = 230m / s, azimuth angle AZ = 15°, and elevation angle EL = -2.3°.

[0050] Step 3: According to the target distance R=125km, speed V=230m / s and carrier ground speed Vp=150m / s, determine the waveform pulse repetition period PRI=11us and pulse width Pw=2us used in the current frame.

[0051] Step 4: Force the radar to use manual automatic gain control mode. The manual automatic gain control value is 6dB of the automatic gain control value used in the previous frame to track the target.

[0052] Step 5: Determine the transition period N1=180 and the number of accumulated points N2=4096 of the current frame according to the frame period of the current frame, with a total of N1+N2=4176 pulses.

[0053] Step 6: Set the radar antenna to broadband transmission mode and broadband reception mode.

[0054] Step 7: Within N2=4096 pulses before the current frame, only the radar detection excitation signal is transmitted, which does not affect the detection power.

[0055] Step 8: Within N1=180 pulses after the current frame, transmit an interference excitation signal, and use the electronic warfare module to perform smart noise interference or false target interference on the radiation source according to the received radiation source signal.

[0056] Step 9: In the current frame pulse string, during the reception period, the radar samples the detection signal normally, and the electronic warfare module detects the radiation source signal in real time.

[0057] Step 10: According to the target distance R=125km, the first echo data N3=76 for the initial processing of the radar receiving signal is calculated, which is obtained by rounding up 2*R / C / PRI.

[0058] Step 11. The radar processes the received signals N3=76 to N3+N1-1=4171 pulses and obtains target parameters, including distance, speed, azimuth, pitch angle, etc., thereby completing the detection, reception, interference and other functions in the current frame, so that the radar has a complete integrated detection, reconnaissance and interference strategy.

[0059] The radar detection and interference integration method disclosed in the above embodiment realizes detection, reception and interference simultaneously within one frame inside the radar without affecting each other. During the detection and reception of echoes, the electronic warfare module can identify the radiation source and provide interference parameters. Without changing the existing detection of the radar, the useless transition cycle time of radar detection is used to use this part of time for interference, thereby improving the energy utilization efficiency of the radar.

[0060] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A radar detection and detection integrated method, characterized in that: include: Step 1: In the radar air-to-air mode, determine that the resource scheduling type is tracking mode; Step 2: Detect and obtain the target distance R and speed V; Step 3: Determine the waveform pulse repetition period PRI and pulse width Pw used in the current frame according to the target distance R, speed V and carrier ground speed Vp; Step 4: Force the radar to use manual automatic gain control mode; Step 5: Determine the transition period N1 and the number of accumulated points N2 of the current frame according to the current frame period, for a total of N1+N2 pulses; Step 6: Set the radar antenna to broadband transmission mode and broadband reception mode; Step 7: Within N2 pulses before the current frame, only the radar detection excitation signal is transmitted; Step 8: within N1 pulses after the current frame, transmit an interference excitation signal; Step 9: In the current frame pulse string, during the reception period, the radar samples the detection signal normally, and the electronic warfare module detects the radiation source signal in real time; Step 10: Calculate the first echo data N3 of the radar receiving signal for initial processing according to the target distance R; Step 11: The radar performs signal and data processing on the received signals N3 to N3+N1-1 pulses to obtain target parameters.

2. The radar detection and detection integration method according to claim 1 is characterized in that: In step 4, when the radar is forced to use the manual automatic gain control mode, the manual automatic gain control value adopts the automatic gain control value used for tracking the target in the previous frame.

3. The radar detection and detection integration method according to claim 1 is characterized in that: In step eight, within N1 pulses after the current frame, when the interference excitation signal is emitted, the electronic warfare module is used to perform smart noise interference or false target interference on the radiation source according to the received radiation source signal.

4. The radar detection and detection integration method according to claim 1 is characterized in that: In step 10, according to the target distance R, the first echo data N3 for the initial processing of the radar receiving signal is calculated, which is specifically obtained by rounding up 2*R / C / PRI, where C is the speed of light.

5. The radar detection and detection integration method according to claim 1, characterized in that: In step eleven, the radar performs signal and data processing on the received signals N3 to N3+N1-1 pulses to obtain target parameters, including distance, speed, azimuth, and pitch angle.

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